Active Record Query Interface — Ruby on Rails Guides
ruby on rails - has_many through association dependent error is still referenced in table users - Stack Overflow
rails aborted! ActiveRecord::InvalidForeignKey: PG::ForeignKeyViolation: ERROR: update or delete on table "users" violates foreign key constraint "fk_rails_03de2dc08c" on table "comments" DETAIL: Key (id)=(11) is still referenced from table "comments ...
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postgresql - How can I show a flash notice message when I get PG::ForeignKeyViolation error in Rails - Stack Overflow
Understanding Zeitwerk in Rails 6 | by Marcelo Casiraghi | Cedarcode | Medium
ruby on rails - ERROR: delete on table violates foreign key constraint. Key id is still referenced from table (many) - Stack Overflow
Referencing the same model twice in Rails? - Ruby - SitePoint Forums | Web Development & Design Community
Ruby on Rails: how to create a reference to a db table with string as primary key - Stack Overflow
T-Glide Rails Assembly - 36 inch Professional Series II - SawStop Part Store
ruby on rails - ERROR: delete on table violates foreign key constraint. Key id is still referenced from table (many) - Stack Overflow
Chapter 8: Composite Keys and Domain-Key Normal Form | dan chak